/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package datafu.pig.random;

import java.io.IOException;
import java.util.UUID;

import org.apache.pig.EvalFunc;
import org.apache.pig.builtin.Nondeterministic;
import org.apache.pig.data.*;
import org.apache.pig.impl.logicalLayer.schema.Schema;

/**
 * Generates a random UUID using java.util.UUID
 */
@Nondeterministic
public class RandomUUID extends EvalFunc<String>
{
    public String exec(Tuple input) throws IOException
    {
        return UUID.randomUUID().toString();
    }

    @Override
    public Schema outputSchema(Schema input)
    {
        return new Schema(new Schema.FieldSchema("uuid", DataType.CHARARRAY));
    }
}

